Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1941bb1d3078cf…

MALICIOUS

PDF

76.3 KB Created: 2021-03-09 14:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6cd25adae963c931fdaee2ed14ec6bbb SHA-1: 89c3e9ced0b100038944c428cb6c6d67c9e645ed SHA-256: 4d1941bb1d3078cfd983b15e808eaec2611900a66f86ae647e04866bcf456589
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as Pdf.Phishing.Trojan. It contains an embedded URI pointing to 'botokaw.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/award?keyword=class+11+chemistry+book+pdf+cbse PDF link annotation
    • http://befotuke.mywebcommunity.org/74871771811.pdfIn PDF document text
    • http://wopafopu.22web.org/which_graph_database_facebook_uses.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/angle_of_elevation_word_problems_with_answers.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/application_pebble_watch_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_603c75531c100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_6023cfa0964cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_600a54e327f92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487647/normal_5ff77bd56f99b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a1cffc-dbf4-445c-a875-65a7cf64b2d8/xaxitifoxat.pdfIn PDF document text
    • http://kadizilurojiniz.onlinewebshop.net/apache_ranger_user_guide.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_03be0abea5154dfe8b6c84c425d6be05.pdf?index=trueIn PDF document text
    • http://zirexig.epizy.com/bsf_constable_application_form_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a654b9db-c877-4377-8387-e49c19e579d8/63831586136.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/tilegisof.pdfIn PDF document text
    • http://ximumipos.rf.gd/35831798350.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/xogoviwedologofezo.pdfIn PDF document text
    • http://girubulofi.epizy.com/cuanto_son_2_pulgadas_en_centimetros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3bf000e-6195-42ed-b156-239a04baf7ac/begagupafoxinajuf.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/rival_20_quart_programmable_roaster_oven_directions.pdfIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_6f549fb2442f45adaa640a80f07e7962.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/63710268695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1df922-407a-4baa-8bbd-1ed13107fbdf/keyboard_ctrl_shortcuts_not_working_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/81674902029.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 5656 bytes
SHA-256: 219e920df84830d1e1ef0838a220fb259816a7ce533f1ca1c89e03d1fcc67d96
font_01_sfnt_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 10424 bytes
SHA-256: bb0874ca0d77f77a6999cca670e7b39b19a01928da7b6ca325721b555e286449

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